Improvement in expansive gears for feed-rolls of wood-planers



R. N. MERIAM. Expansve Gears for Feed-Rolls of Wood Planers, c,

Patented Feb. 17.1874. v

x x1 1 r 1 2255/),

RUFUS N, MERIAM, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN EXPANSIV GEARS FR FED-ROLLS 0F WOOD-PLANERS, &c.

Specifica-tion forming part of Letters Patent No. Hd, dated February 17, 1874, application tiled December 27, 1873.

To all whom it may concern:

Beit known that I, RUFUs N. Miramar, ot the city and county of IVorcester and State of Massachusetts, have invented an Improvement in Expansive Gear for Feed-Rolls of rood- Flaners and other machines, of which. the fol lowing is a speeication:

This invention consists in a novel connection or" the intermediate gear with the main gear of the rolls, including a vibrating'stud for one of the intermediate gears, whereby the usual straps, which are lia-ble to work loose and become shacliling, are dispensed with, and a solid movement, or nearly so, for the gear is obtained, restricting wear to the journals and pivots and slight movement ot' the vibrating stud iu its slot-ted support. Furthermore, one ot the gears is made double, whereby gear of larger diameter than the feed-rolls may be used on the' latter, which gives au easier or more effective action gene ally In the accompanying drawing, which forms part of the specification, Figure l represents a side view of the feed-roll mechanism and expansive gear of a wood-planer, in part, having my invention applied to said gear. Fig. 2 is a horizontal section of the same on the line mit; Fig. 3, a vertical section on the line y y; and Fig. et, a further vertical section in a plane or planes at right angles to Fig. 3, onfthe irregular line z e.

Similar letters of reference indicate correspondin g parts.

A B are the feed-rolls, the upper one, A, of which is inade capa-ble ot' adjustment up or down, as usual, in vertically-slotted uprights (l, by means of bevel-gear D E and screws F ron both sides of the machine, to provide for varying the distance of the rolls A B apart, according' to the thickness of the stuft' or niaterial being fed in between and by them. G and H are the main gear-wheels on the ends of the rolls, and I and J the intermediate wheels of the expansive gear, whereby, on driving motion being communicated to the lower roll, B, both rolls A and B are made to revolve in similar directions as regards their contiguous surfaces. It is proposed to make one of these intermediate wheels, preferably the lower one, I, double-that is, of a sutileient width to gear both with the other intermediate wheel and with the main wheel of one of the rolls-when the main wheels G and H of the latter are arranged out of vertical line with each other. By this construction and combination, l am enabled to use gear oi' larger diameter than the feed-rolls on the latter, and thereby to obtain an easier or more effective action generally.

l'f desired, however, a wheel of single width may be substituted for the double one, and smaller wheels arranged in the same common plane, be used.

The one intermediate wheel I revolves on or with a :fixed stud, K-that is, a stud the eenter of which does not change. This wheel is in gear both with the main wheel H ot' the lower roll and with its fellow or other intermediate wheel, J, which latter gears with the wheel Gr of the upper roll. The intermediate gear J works on or is carried by a stud, L, which is made capable of vibrating or of being' moved backward or forward along a slotted support, M, and said vibrating stud connected, by a free coupling-bar, N, with the shaft or journal b ofthe upper roll, A, whereby, on raising or lowering said roll, the vibrating stud L moves in or out, but only to an extent equal to the versed sine of the are described by the coupling-bar N at its free connection with the vertically-adjustable journal of the upper roll.

The wear consequent on the slight vibration of the stud L is so trilling as to be unworthy of taking into consideration, and, practically speaking, the whole wear is restricted to the revolving motion of the gears in or on their bearings.

After the adjustment of the roll has been made, the stud L may be secured in its slightlychanged position within the slotted support M by a nut on the end of it.

This connection of the several wheels with each other and the main frame dispenses with the usual shachling-straps employed to carry the intermediate gear, and gives a much more solid movement t'or the gear.

I claiml. The coupling-bai.' N and slotted support )I in combination with. the xed stud l( and V1I, rolls A B, coupling-bar N, and slotted sup- 'vibrating stud L, their gear-wheels, and the port M, substantially as described, to operate gear of the rolls A B, substantially as dein the manner :md for the purpose specified. scribed, to operate in the nummer and for the T T T J purpose Speced. LI'FLS b' MERIAM' 2. The double wheel I, mounted ou :L xed W'tnesscs: Stud, and the gear-Wheel J, on :L vibrating HORACE A. RICHARDSON, stud, in combination with the gear-Wheels (`r TBL II. YOITNG. 

